US3586523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcined kaolin clay pigment
Assignee: BASF Catalysts LLC
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Filing: 1968-01-15
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Granted: 1971-06-22
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Expires: 1988-01-15
Abstract
Abstract A FINELY DIVIDED, SUBSTANTIALLY ANHYDROUS AMORPHOUS ALUMINUM SILICATE OBTAINED BY CALCINING A SPECIFIC TYPE OF KAOLIN CLAY, NAMELY HARD SEDIMENTARY KAOLIN CLAY, IS USED AS A FUNCTIONAL FILLER FOR NEWSPRINT OR SIMILAR LIGHTWEIGHT PRINTED PAPER THAT IS PRINTED WITH LOW VISCOSITY INK TO REDUCE INK STRIKE-THOUGH AND TO INCREASE SHEET BRIGHTNESS AND OPACITY.
Inventors
- 👤 John R Fanselow
- 👤 Daniel A Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:19
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/40; C09C1/42; D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/68; C01; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/12; C01P2006/19; C01P2006/21; C01P2006/60
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |